This setting specifies which language to use in the Reflection user interface and Help files. If you don't have the necessary .DLL file, this setting does not change the language used in the interface and help files. However, it does change some of the accelerator keys to those used in the localized version of the product.
This setting is similar to the Language Override setting, however Locale saves language information to a settings file. Use Locale to select a language for a particular session for which you have created a settings file. Use Language Override to select a language for all new sessions.